Machine for edging sheet metal



(No Model.)

J. B. TYLER. Machine for Edging Sheet Metal. No. 235,317. Patented Dec. 7,1880.

WI E K ez o- I.-

INVENTOR ATTORNEYS.

N. PEIERS, FHOTO-LITHOGRAPHER, WASHIIGTON. D. C

UNITED STATES PATENT @rrrca.

JAMES E. TYLER, OF ORANGE COURT-HOUSE, VIRGINIA.

MACHINE FOR EDGING SHEET METAL.

SPECIFICATION forming part of Letters Patent No. 235,317, dated December 7, 1880.

Application filed October 4, 1880. (No model.)

To all whom it may concern:

Be it known that I, JAMES E. TYLER, of Orange Court-House, in the county of Orange and State of Virginia, have invented a new and Improved Machine for Ed gin g SheetMetal; and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention relates to an improved ma- I chine for forming either a single or a double look upon the edges of sheet-metal plates that may be hooked and pressed together to form a secure joint, either for the manufacture of articles made of sheet metal or for metal roofing and similar purposes; and the improvement consists, essentially, in a pair of reciproeating griping-jaws, one of which is provided with a lip turned up over the end of the other jaw to hold the edge of the metal sheet between them and pull it beneath a presser-bar, which operation will suflice to form a single fold or lock, and with which device is combined a pivoted bending-jaw that may be forced around the griping'j aws above referred to, to bend another fold upon the edge of the metal sheet to form a double fold.

My improvement further consists in hingin g the griping-jaws together and providing them with a spring which clamps the edges of the jaws tightly together.

The improvement consists, also, in providing a cam actuated by a lever to overcome the springs and release the work, as hereinafter fully described.

In the accompanying drawings, Figure 1 is a plan View of the machine with the jaws extended ready to receive and gripe the edge of the plate; Fig. 2, a reverse plan View of the same; Fig. 3, a longitudinal section in the line .00 x of Fig. lwi th the jaws extended; Fig. 4, a similar view of the same with the jaws retracted to make the first fold, and also showing the bending-jaw, in dotted lines, thrown down to make the second fold; Fig. 5, a longitudinal section in the line a: x of Fig. 1, showing the jaws extended and the cam forced down upon them to open the griping-jaws and release the metal from between them.

The machine may be attached to a block of wood, A, secured to a table either in avertieal or a horizontal position, preferably the latter. Guide-plates B are secured to the sides of the block and underlap its lower edges to form grooves 12 11, between and into which may rest and freely slide a rectangular griping-plate, C, to which is secured a link, 0, held between guides c on the bottom of the block A, and connected by a pin, 0 with a lever, D, pivoted to the bottom of the block, and formed with a slot, 01,- in it, by which means the griping-plate 0 maybe reciprocated between its guides from the position shown in Fig. 1 to that shown in Fig. 4.

The griping-plate G is formed with a hookshaped lip, 0 turned up to overlap the edge of another griping-plate, E, hinged to the plate 0 at F.

G G are spring-plates riveted at one end between the griping-plates and to one of them, so that the edges or jaws c c of the gripingplates will be pressed closely together to hold the edge of the plate to be folded.

A presser-bar, H, is secured across the top of the upper griping-plate, and is secured to cars on the ends of the guide-plates B, so that its face will be parallel to and Within the range of contact of a sheet of metal, M, projecting from the jaws of the griping-plates.

When it is desired to form an open fold or single lap the edge of the sheet metal M is griped between thejaws by the springs G, as in Fig. 3, and saidjaws are then drawn back beneath the presser-bar by the lever, to bend the metal M, as shown in Fig. 4. The plate of metal may then be withdrawn from between the jaws, and is ready to be interlocked with a corresponding plate and hammered or pressed down to form the joint.

In order that the upper griping-plate, E, may be readily forced down against the springs to release their gripe upon the j aws of the gripin g-plates, the presser-barH maybe hinged or pivoted at its ends and provided with a camplate, I, and lever K, by which the cam-plate may be partially rotated backward, as in Fig. 5, and forced against the upper griping-plate, to overcome the pressure of the springs and open the jaws c c.

The cam-plate may extend the entire length of the griping-jaws, and is curved around the bar H in such manner that it will fold closely around and beneath the jaws of the gripingplates when rotated forward, as indicated by the curved arrow in Fig. 4. thus bending the plate M with another told at its edge so shaped that when united with a plate folded in a similar Way the edges will form a double-folded lap-joint.

\Vhen the double fold has been made upon the edge of the plate, as above described, the lever K may be reversed, so that the back of the cam-plate will press upon the upper griping-plate to release its hold upon the plate of sheet metal, and the gripingplates may be pushed forward so that their jaws will be removed from beneath the presser-bar,in which position,while still pressing upon lever K, the sheet-metal plate may be slid toonc sidcalong the length of the jaws until it has been dis' connected from them.

When the sheet-metal plate is to be interlocked with a corresponding plate to form a joint their folded edges must be interloclu d in the manner just described by placing the edges together at their ends and sliding the plates one across the other.

Various changes may be made in the abovedescrlbed machine without departing from the spirit of my invention.

What I claim as new is- 1. In a metal-edging machine, the combina tion of the spring griping-plates arranged to slide in guides with suitable means for reciprocating them, the edge of one griping-plate being bent to overlap the edge of the other plate, and a presser-bar arranged relatively to thejaws of the presser-plates to bend the plate over as it is drawn beneath it, substantially as described.

2. In a machine for bending the edges of sheet metal to form a double fold, the combination of the spring reciprocating griping-plates, a presscr-bar arranged above the same, and a rotary cam or bending-plate arranged relatively to each other, so that the bending-plate will encircle and pass beneath the edges of the griping-jaws to turn the second fold in the metal plate, substantially as described.

3. In a machine for edging sheet metal, the combination of the gri ling-plates O E, hinged together and provided with suitable means for reciprocating them, the presser-springs G, the presser-bar ll, and the cam-plate I, and lever K, for operating it to compress the springplates and release the work, substantially as described.

The above specification of my invention signed by me this 2d day of October, 1880.

JAS. E. TYLER. Witnesses SoLoN G. KEMON, UIIAS- A. PETTIT. 

